/* 
 * GlassNav - Modern Glassmorphism UI Components
 * Version: 1.0.0
 * Author: GlassNav Team
 * License: MIT
 */

/* ===== VARIABLES ===== */
:root {
    /* Light Theme (Default) */
    --primary-color: #4CAF50;
    --primary-light: #81C784;
    --primary-dark: #388E3C;
    --text-color: #333333;
    --text-light: #666666;
    --background: #f8f9fa;
    --card-bg: rgba(255, 255, 255, 0.7);
    --header-bg: rgba(255, 255, 255, 0.8);
    --footer-bg: rgba(255, 255, 255, 0.8);
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --border: 1px solid rgba(255, 255, 255, 0.18);
    --hover-bg: rgba(255, 255, 255, 0.9);
    --dropdown-bg: rgba(255, 255, 255, 0.95);
    
    /* Transitions */
    --transition-speed: 0.3s;
    --transition-function: ease;
}

/* Dark Theme Variables */
[data-theme="dark"] {
    --primary-color: #2E7D32;
    --primary-light: #43A047;
    --primary-dark: #1B5E20;
    --text-color: #f1f1f1;
    --text-light: #cccccc;
    --background: #121212;
    --card-bg: rgba(30, 30, 30, 0.7);
    --header-bg: rgba(18, 18, 18, 0.8);
    --footer-bg: rgba(18, 18, 18, 0.8);
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    --border: 1px solid rgba(255, 255, 255, 0.08);
    --hover-bg: rgba(40, 40, 40, 0.9);
    --dropdown-bg: rgba(30, 30, 30, 0.95);
}

/* ===== RESET & BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color var(--transition-speed) var(--transition-function),
                color var(--transition-speed) var(--transition-function);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: color var(--transition-speed) var(--transition-function);
}

a:hover {
    color: var(--primary-dark);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

button {
    cursor: pointer;
    border: none;
    outline: none;
    background: none;
}

/* ===== GLASSMORPHISM EFFECTS ===== */
.glass-effect {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 10px;
    border: var(--border);
    box-shadow: var(--shadow);
}

/* ===== HEADER COMPONENT ===== */
.glassnav-header {
    position: sticky;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: var(--header-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: var(--border);
    box-shadow: var(--shadow);
    transition: background var(--transition-speed) var(--transition-function),
                backdrop-filter var(--transition-speed) var(--transition-function),
                box-shadow var(--transition-speed) var(--transition-function);
}

.glassnav-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

/* Logo */
.logo a {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-color);
    transition: color var(--transition-speed) var(--transition-function);
}

.logo a span {
    color: var(--primary-color);
    transition: color var(--transition-speed) var(--transition-function);
}

.logo a:hover {
    color: var(--primary-dark);
}

/* Navigation */
.main-nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    gap: 10px;
}

.nav-item {
    position: relative;
}

.nav-item a {
    display: flex;
    align-items: center;
    padding: 10px 15px;
    color: var(--text-color);
    font-weight: 500;
    border-radius: 6px;
    transition: all var(--transition-speed) var(--transition-function);
}

.nav-item a i {
    margin-right: 6px;
}

.nav-item a:hover,
.nav-item.active a {
    background: var(--hover-bg);
    color: var(--primary-color);
}

.nav-item.active a {
    font-weight: 600;
}

/* Dropdown Menu */
.dropdown {
    position: relative;
}

.dropdown-toggle .fa-chevron-down {
    font-size: 0.8rem;
    margin-left: 5px;
    transition: transform var(--transition-speed) var(--transition-function);
}

.dropdown:hover .fa-chevron-down {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 180px;
    background: var(--dropdown-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 6px;
    box-shadow: var(--shadow);
    border: var(--border);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-speed) var(--transition-function);
    z-index: 100;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(5px);
}

.dropdown-menu li a {
    padding: 10px 15px;
    display: block;
    color: var(--text-color);
    font-weight: normal;
    transition: all var(--transition-speed) var(--transition-function);
}

.dropdown-menu li a:hover {
    background: var(--hover-bg);
    color: var(--primary-color);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 200;
}

.mobile-menu-toggle span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--text-color);
    border-radius: 3px;
    transition: all var(--transition-speed) var(--transition-function);
}

/* Theme Toggle */
.theme-toggle {
    margin-right: 0;
    position: relative;
}

.theme-toggle input {
    opacity: 0;
    width: 0;
    height: 0;
    position: absolute;
}

.toggle-label {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 60px;
    height: 30px;
    background: var(--card-bg);
    border-radius: 30px;
    padding: 0 5px;
    cursor: pointer;
    box-shadow: var(--shadow);
    border: var(--border);
    transition: all var(--transition-speed) var(--transition-function);
}

.toggle-label i {
    font-size: 14px;
    transition: all var(--transition-speed) var(--transition-function);
}

.fa-sun {
    color: #f39c12;
}

.fa-moon {
    color: #34495e;
}

.toggle-ball {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 26px;
    height: 26px;
    background: var(--primary-color);
    border-radius: 50%;
    transition: transform var(--transition-speed) var(--transition-function);
}

#theme-toggle-checkbox:checked + .toggle-label .toggle-ball {
    transform: translateX(30px);
}

/* ===== FOOTER COMPONENT ===== */
.glassnav-footer {
    background: var(--footer-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-top: var(--border);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.08);
    padding: 50px 0 20px;
    margin-top: 50px;
    transition: background var(--transition-speed) var(--transition-function),
                backdrop-filter var(--transition-speed) var(--transition-function),
                box-shadow var(--transition-speed) var(--transition-function);
}

.footer-top {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.footer-section h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--primary-color);
    position: relative;
    padding-bottom: 10px;
}

.footer-section h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background-color: var(--primary-color);
}

.footer-section p {
    color: var(--text-light);
    margin-bottom: 15px;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: var(--text-light);
    transition: all var(--transition-speed) var(--transition-function);
}

.footer-section ul li a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.footer-section.contact ul li {
    display: flex;
    align-items: center;
}

.footer-section.contact ul li i {
    margin-right: 10px;
    color: var(--primary-color);
}

/* Newsletter Form */
.form-group {
    position: relative;
    margin-bottom: 10px;
}

.form-group input {
    width: 100%;
    padding: 12px 50px 12px 15px;
    border-radius: 30px;
    border: var(--border);
    background: var(--card-bg);
    color: var(--text-color);
    outline: none;
    transition: all var(--transition-speed) var(--transition-function);
}

.form-group input:focus {
    box-shadow: 0 0 0 2px var(--primary-light);
}

.form-group .submit-btn {
    position: absolute;
    right: 5px;
    top: 5px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-speed) var(--transition-function);
}

.form-group .submit-btn:hover {
    background: var(--primary-dark);
}

.form-message {
    font-size: 0.9rem;
    margin-top: 5px;
    min-height: 20px;
}

/* Social Links */
.footer-middle {
    display: flex;
    justify-content: center;
    margin-bottom: 30px;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--card-bg);
    border-radius: 50%;
    color: var(--text-color);
    font-size: 1.2rem;
    transition: all var(--transition-speed) var(--transition-function);
    border: var(--border);
}

.social-links a:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

/* Footer Bottom */
.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Back to Top Button */
#back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-speed) var(--transition-function);
    z-index: 99;
    box-shadow: var(--shadow);
}

#back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

#back-to-top:hover {
    background: var(--primary-dark);
}

/* ===== DEMO CONTENT STYLES ===== */
.hero {
    padding: 100px 0 50px;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto 30px;
    color: var(--text-light);
}

.btn {
    display: inline-block;
    padding: 12px 25px;
    border-radius: 30px;
    font-weight: 600;
    transition: all var(--transition-speed) var(--transition-function);
}

.primary-btn {
    background: var(--primary-color);
    color: white;
}

.primary-btn:hover {
    background: var(--primary-dark);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.features {
    padding: 80px 0;
}

.features h2 {
    text-align: center;
    margin-bottom: 50px;
    color: var(--primary-color);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 10px;
    border: var(--border);
    box-shadow: var(--shadow);
    padding: 30px;
    text-align: center;
    transition: all var(--transition-speed) var(--transition-function);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.feature-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature-card h3 {
    margin-bottom: 15px;
}

.demo-section {
    padding: 80px 0;
    text-align: center;
}

.demo-section h2 {
    margin-bottom: 20px;
    color: var(--primary-color);
}

.spacer {
    height: 300px;
}

/* ===== RESPONSIVE STYLES ===== */
@media (max-width: 992px) {
    .hero h1 {
        font-size: 2.2rem;
    }
}

@media (max-width: 768px) {
    .glassnav-header .container {
        padding: 10px 20px;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-list {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: var(--card-bg);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        flex-direction: column;
        padding: 80px 20px 30px;
        transition: right var(--transition-speed) var(--transition-function);
        z-index: 100;
        box-shadow: var(--shadow);
        overflow-y: auto;
    }
    
    .nav-list.active {
        right: 0;
    }
    
    .nav-item {
        width: 100%;
    }
    
    .nav-item a {
        width: 100%;
        padding: 15px;
    }
    
    .dropdown-menu {
        position: static;
        width: 100%;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: transparent;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        border: none;
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-speed) var(--transition-function);
    }
    
    .dropdown.active .dropdown-menu {
        max-height: 500px;
    }
    
    .dropdown-menu li a {
        padding-left: 30px;
    }
    
    .hero {
        padding: 80px 0 40px;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .footer-top {
        grid-template-columns: 1fr;
    }
    
    #back-to-top {
        width: 40px;
        height: 40px;
        bottom: 20px;
        right: 20px;
    }
}

@media (max-width: 480px) {
    .logo a {
        font-size: 1.5rem;
    }
    
    .theme-toggle {
        margin-right: 10px;
    }
    
    .toggle-label {
        width: 50px;
        height: 26px;
    }
    
    #theme-toggle-checkbox:checked + .toggle-label .toggle-ball {
        transform: translateX(24px);
    }
    
    .toggle-ball {
        width: 22px;
        height: 22px;
    }
    
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .btn {
        padding: 10px 20px;
    }
}